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dormer

  1. cyberwombat

    Gable valley rafter and header sizes

    Hi. I have a 12:12 gable main roof w 2x12 and an LVL ridge board. I have a gable dormer of same pitch and unsure on how how to size the valley rafter for code IRC 2018. I don't really see anything except the part about the ridge beam/board size. I can use a 2z14 here to match so not too big of...
  2. T

    8 foot wide dormer require engineering?

    Hello, I am planning to build an 8 foot wide dormer onto my roof. In general, does a dormer of this width always require engineering? If I can use the codebook only, what tables can I use to size the headers for this dormer? Thank you very very much!
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